Ariel (moon) (original) (raw)
Ariel
| Discovery | |
|---|---|
| Discovered by | William Lassell |
| Discovered in | 1851 |
| Orbital characteristics | |
| Mean radius | 190,900 km |
| Perihelion | |
| Aphelion | |
| Eccentricity | |
| Orbital period | 2.52 days |
| Inclination | ° |
| Satellite of | Uranus |
| Physical characteristics | |
| Equatorial diameter | 1160 km |
| Surface area | 4,200,000 km2 |
| Mass | kg |
| Mean density | g/cm3 |
| Surface gravity | m/s2 |
| Escape velocity | km/s |
| Rotation period | 2.52 days |
| Axial tilt | ° |
| Albedo | |
| Surface temperature | minmeanmax K K K |
| Atmospheric pressure | 0 kPa |
Ariel is a moon of Uranus discovered in 1851 by William Lassell. Its composition is roughly 50% water ice, 30% silicate rock, and 20% methane ice, and it appears to have regions of fresh frost in places. Largely devoid of impact craters, Ariel appears to have undergone a period of intense geological activity that has produced a huge network of fault canyons and liquid water outflows over its surface.